钢-混组合梁结构噪声研究  

Research on the Influence Parameters of Steel-mixed Beam Structure Noise

作　　者：林玉森 瓮子涵 赵鹤轩 焦世旺 王军文 LIN Yusen;WENG Zihan;ZHAO Hexuan;JIAO Shiwang;WANG Junwen(Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University),Ministry of Education,Shijiazhuang,Hebei 050043,China;Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)

机构地区：[1]道路与铁道工程安全保障省部共建教育部重点实验室(石家庄铁道大学),石家庄050043 [2]石家庄铁道大学,石家庄050043

出　　处：《铁道工程学报》2024年第1期99-106,共8页Journal of Railway Engineering Society

基　　金：河北省自然科学基金资助项目(E2019210215)。

摘　　要：研究目的:为了分析列车高速通过钢-混组合梁桥时因振动产生的结构噪声,本文采用边界元法与统计能量法相结合的方法,建立32 m钢-混组合梁桥有限元模型、31自由度的列车模型及轨道模型,分析列车在轨道不平顺的激励下通过桥梁时的扣件力,并将扣件力作为声学边界条件,进而求解声场中各场点的声压级以及桥梁各板件对峰值声压级的贡献量。研究结论:(1)高速列车通过钢-混组合梁桥时,噪声的峰值声压级为76.5 dB(A);(2)列车以相同时速通过单箱单室和单箱双室钢-混组合梁时,桥梁结构噪声的峰值声压级基本相同,但桥梁各板件对于峰值声压级的贡献量不同;(3)列车通过单箱单室钢-混组合梁桥时,各板件对峰值声压级的贡献量为:腹板>翼缘板>底板>顶板>横隔板;(4)列车通过单箱双室钢-混组合梁桥时,各板件对峰值声压级的贡献量为:翼缘板>顶板>腹板>底板>横隔板;(5)本研究成果可为探究钢-混组合梁桥结构噪声产生机理及减振降噪措施提供参考和借鉴。Research purposes:In order to analyze the structural noise caused by vibration when a train passes through a steel-mixed composite beam bridge with high speed,the finite element model of 32 m steel-mixed composite beam bridge,the train model of 31 degrees of freedom and the track model are established by combining the boundary element method and statistical energy method,and the fastener force of the train passing the bridge under the incentive of uneven track is analyzed.By taking the fastener force as the acoustic boundary condition,the sound pressure level of each field point and the contribution of each bridge plate to the peak sound pressure level are calculated.Research conclusions:(1)When a high-speed train passes through a steel-hybrid girder bridge,the peak sound pressure level of the noise is 76.5 dB(A).(2)When the train passes through the single-box single-chamber and unidirectional double-chamber steel-mixed beams at the same speed,the peak sound pressure level of the bridge structure noise is basically the same,but the contribution of each plate of the bridge to the peak sound pressure level is different.(3)When the train passes through the single-box single-chamber steel-hybrid girder bridge,the contribution of each plate to the peak sound pressure level is:the web>the flange plate>the base plate>the top plate>the horizontal partition.(4)When the train passes through the single-box double chamber steel-hybrid girder bridge,the contribution of each plate to the peak sound pressure level is:the flange plate>the top plate>the web plate>the base plate>the horizontal partition.(5)The research results can provide theoretical reference for exploring the mechanism of structural noise generation and vibration and noise reduction measures of steel-mixed composite beam bridge.

关 键 词：钢-混组合梁桥 车桥耦合 结构噪声 边界元法 统计能量法 

分 类 号：TB132[理学—物理] U441.3[理学—应用物理]